PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT
3 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ
: Outdoor Unit
Ⓑ
: 1st branch (Y branch)
Ⓒ
: Indoor Units
Ⓓ
: Downward Indoor Unit
Ⓔ
: Connection branch pipe between Outdoor
units: ARCNN31
Ⓕ
: Connection branch pipe between Outdoor
units: ARCNN21
10 m or
less
L150 m (200 m : Conditional application)
ODU Capacity
Master ≥ Slave1 ≥ Slave 2
l
40 m (90 m : Conditional application)
H 110 m
Slave2
Slave1
Master
h 40 m
h1
Piping length form outdoor branch to outdoor unit
≤
10 m, equivalent length : max. 13 m
(for 18 HP or more)
Conditional Application
To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
• Diameter of pipes between first branch and the last branch should be increased by one
step, except pipe diameter B,C,D is same as Diameter A
Ø6.35
→
Ø 9.52
→
Ø 12.7
→
Ø 15.88
→
Ø 19.05
→
Ø 22.2
→
Ø 25.4*, Ø 28.58
→
Ø 31.8*,
Ø 34.9
→
Ø 38.1*
* : It is not necessary to size up.
• While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated
twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e
≤
1,000 m
• Length of pipe from each indoor unit to the closest branch (a,b,c,d,e)
≤
40 m
• [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe outdoor unit to the closest indoor unit 1 (A+a)]
≤
40 m
ENGLISH
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